Answer
$x = -10$
Work Step by Step
$30 - 40 = -2x + 7x - 4x$
$-10 = -6x + 7x$
$-10 = x$
$x = -10$
Basic College Mathematics (9th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0321825535
ISBN 13:
978-0-32182-553-7
Chapter 9 - Basic Algebra - 9.7 Solving Equations with Several Steps - 9.7 Exercises - Page 681: 69
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